The Washington Nationals have agreed to send Michael Morse to Seattle as part of a three-team deal that would move catcher John Jaso from the Mariners to the Athletics and pitcher A.J. Cole from Oakland to the Nationals.  The deal was first reported by The Washington Post.Morse hit .291 with 18 home runs and 62 RBIs for the Nationals in an injury-plagued season, playing mostly as an outfielder. The NL East champions acquired Denard Span in a trade and contemplated moving the 30-year-old Morse to first base but then re-signed Adam LaRoche. Morse played for the Mariners from 2005-08. He was traded to the Nationals in 2008 for outfielder Ryan Langherhans. Mariner General Manager Jack Zdurienck says Morse will compete for playing time at Designated Hitter, outfied and first base.  Zdurienck also says Morse is healthy and excited to come back to Seattle.